Step 4: Making slots for the mirrors.

Step 5: Finishing up and final notes.

After you've inserted your mirrors, you can finish up by covering the edges of the mirrors in more tape. You don't want to accidentally cut yourself w...

Have you ever wanted to peek around a corner without your head poking out? How about peering through your window without people seeing you. In this instructable, I'll show you how to make a super easy periscope that will keep you hidden while you spy!

How it works: Periscopes work by using mirrors to show you an image out of your direct line of sight. It allows you to to look past obstructions in your line of view, look around corners, or over walls.

Step 1: Supplies and tools.

To make this super cool spy periscope you're going to need:

1. Some sort of long narrow cardboardish box. You could use an orange juice box, or something with that basic shape. I used a Thin Mints box, because it was narrow, long, and sturdy.2. 2 small mirrors. I found my two mirrors out of old make-up containers. They're easy to pry out of the top, but be careful, if the mirror breaks, it could cut you.3. Duck tape. 4. A knife. I used my Leatherman, but an X-acto knife, or carpet cutter works too.5. A marker.

Step 2: Prepairing the body of the periscope.

Take your cardboard box. It should be sorta long, and narrow in shape. The first thing you want to do is to close up the ends with your tape. Just close the ends and cover them with a piece or two of tape.

After you've done this, cover the whole box in tape. The tape adds to the rigidity of the box, and makes everything look cleaner and smoother than if it were left the way it was. And it makes it look less suspicious than a box of thin mints peeking up over the window.

Nice instructable. These are so cool. I had a deprived childhood. I wanna build one that has a rusty green metal case and uses motors to adjust. Has this been done before? And has anyone tried attaching binocs to this kind of periscope? Does it mess with the optics, or could it work?

I can see the news news now: "Earlier today, while trying to make an attempt for the Guinness World Record of tallest functional periscope, a man fell down an elevator shaft in the Burj Dubaia skyscraper under construction in Dubai, United Arab Emirates, the tallest man-made structure on Earth, at 2,087 ft."